Today I had my first warning light come on. It happened three times during my 40 mile drive to work in stop and go traffic. For those with the car, it's the symbol on page 101 of the manual, second one up from the bottom. Here's the description of what the warning light means:
"Energy Recovery limited due to hot high voltage battery"
"Be ready to brake at all times as the vehicle is not decelerated as is usual during energy recovery"
You lose the Regen function when light is on.
Outside temp was 74, left a cool garage before starting my drive. Battery temp was 91 when light came on.
I've been told that running the AC will help cool the battery as the cool air will go into the vents behind the front seats. Will try that and see what happens.
I'm now at 340 miles and loving the car! Still no one has noticed that the MINI E is anything special.